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Title: | The screening of various biochars for Cd2+removal at relevant soil pH | Authors: | LATAF, Amine CARLEER, Robert YPERMAN, Jan SCHREURS, Sonja D'HAEN, Jan CUYPERS, Ann VANDAMME, Dries |
Issue Date: | 2023 | Publisher: | PERGAMON-ELSEVIER SCIENCE LTD | Source: | Waste Management, 168 , p. 376 -385 | Abstract: | Fourteen biochars from seven biomass sources were investigated on their long-term Cd2+ removal. The experiments consisted of a ten-day batch Cd2+ adsorption in a pH-buffered solution (pH = 6) to minimise pH effects. Insect frass, spent peat and chicken manure-derived biochars are promising Cd2+ adsorbents. Pyrolysis temperature was crucial for optimising Cd2+ removal by insect frass and spent peat-derived biochars. For these biochars, a pyrolysis temperature of 450 degrees C was optimal. In contrast, the Cd2+ removal by chicken manure biochars was independent of pyrolysis temperature. The Cd2+ removal by insect-frass and spent peat-derived biochars was associated with chemisorption on surface functionalities, while using chicken manure biochars was more associated with Cd2+ precipitation. The kinetics of Cd2+ removal over the course of ten days showed that insect frass biochar (450 degrees C) showed a gradual increase from 36 to 75 % Cd2+ removal, while chicken manure and spent peat-derived biochar (450 degrees C) already showed a higher Cd2+ removal (72 - 89 %) after day 1. This evidences that a long-term Cd2+ removal effect can be expected for some biochars. This should certainly be taken into consideration in future soil-based experiments. | Notes: | Vandamme, D (corresponding author), Hasselt Univ, Analyt & Circular Chem, IMO, CMK, Agoralaan Bldg D, B-3590 Diepenbeek, Belgium. dries.vandamme@uhasselt.be |
Keywords: | Cadmium;Adsorption;Biochar;Long-term effect;Agro-residues | Document URI: | http://hdl.handle.net/1942/40796 | ISSN: | 0956-053X | e-ISSN: | 1879-2456 | DOI: | 10.1016/j.wasman.2023.06.018 | ISI #: | 001035845400001 | Rights: | 2023 Elsevier Ltd. All rights reserved | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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